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• unravel the secrets of super-spreading; • advance our understanding of host factors involved in the successful “seeding” of SARS-CoV-2 infection; • elucidate the role of young adults in the genesis of the second European SARS-CoV-2 wave; • continue to describe the conditions under which people should be allowed to gather in larger groups. SARS-CoV-2 vaccines will have to be rolled out safely and affordably to billions of people. In the meantime there will be no return to a “normal” pre2020 way of life, and the best prevention scheme is a potpourri of physical distancing (Kissler 2020), intensive testing, case isolation, contact tracing, quarantine (Ferretti 2020) and as a last (but not impossible) resort, local lockdowns and curfews. If thanks to the history-making ultra-fast development of potent vaccines the pandemic should be over earlier than most people feared, SARS-CoV-2 will have taught the world a lesson of value for future pandemics: face masks are a simple and powerful tool to mitigate the impact of infectious respiratory diseases.

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